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1974 Thing wiper moter and switch
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SBL74
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Joined: November 25, 2013
Posts: 125
Location: Treasure Island, FL
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PostPosted: Thu Nov 11, 2021 3:05 pm    Post subject: 1974 Thing wiper moter and switch Reply with quote

I have seen some incorrect diagrams of the Thing wiper motor wiring and its steering column switch.

From a poster I have, I see that the motor gets +12v, and also the switch gets +12v, both from fuse #1. A ground is also shown in the switch, and, also on one of the terminals on the motor. I cannot tell if the switch is supposed to make a connection between terminals on the motor to ground or is it to +12? If I know that I can troubleshoot better.

Also, from what I see I have deduced:

Black/grey is 12 v to both the switch and to the motor via the fuse = 53a
On the motor the brown wire is constant ground = pin 31

This leaves 3 wires on the motor:

#53: black
#53e: green
#53b: black/yellow

I guess one for fast (maybe black/yellow #53b), one for slow (maybe #53 black), and one for "return" (maybe #53e, green?). Would someone verify these?

When I am done I will make a standard schematic, which I have yet to find.

Steve


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SBL74
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Location: Treasure Island, FL
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PostPosted: Fri Nov 12, 2021 10:52 am    Post subject: Re: 1974 Thing wiper moter and switch Reply with quote

bump
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Semper_Dad
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PostPosted: Fri Nov 12, 2021 12:16 pm    Post subject: Re: 1974 Thing wiper moter and switch Reply with quote

I know people are not fond of current diagrams but I made this one to show the current flow for each position of the wiper switch.

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SBL74
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Joined: November 25, 2013
Posts: 125
Location: Treasure Island, FL
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PostPosted: Fri Nov 12, 2021 7:39 pm    Post subject: Re: 1974 Thing wiper moter and switch Reply with quote

So,

Low speed connects 53 to 53a
High speed connects 53b to 53a
Off/Park connects 53 to 53e

Correct?
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